Early establishment of Suaeda salsa population as affected by soil moisture and salinity: Implications for pioneer species introduction in saline-sodic wetlands in Songnen Plain, China

An, Yu; Gao, Yang; Zhang, Yang; Tong, Shuo; Liu, Xiaohui

doi:10.1016/j.ecolind.2019.105654

Cited by 32 publications

(11 citation statements)

References 39 publications

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“…The climate of the region is a continental monsoon climate, with a mean annual temperature of 4.4 • C. The area has meadow bog soil, dominated by the Carex, Deyeuxia purpurea, Scirpus planiculmis, and Phragmites australis plant communities [15]. This area experiences continuous drought and serious salinization/secondary-salinization due to the excessive consumption of water for farmland irrigation in the upper reaches of the Nenjiang River [32]. In recent years, the Chinese government has conducted a wetland restoration project in Momoge, including recovery of the hydrological conditions, vegetation restoration, and construction [32][33][34].…”

Section: Study Sitesmentioning

confidence: 99%

“…This area experiences continuous drought and serious salinization/secondary-salinization due to the excessive consumption of water for farmland irrigation in the upper reaches of the Nenjiang River [32]. In recent years, the Chinese government has conducted a wetland restoration project in Momoge, including recovery of the hydrological conditions, vegetation restoration, and construction [32][33][34]. Therefore, this study was conducted at 15 sites in the Momoge Wetland, from two typical marsh sites having the Phragmites and Carex vegetation types (Figure 1).…”

Section: Study Sitesmentioning

confidence: 99%

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Disentangling Responses of the Subsurface Microbiome to Wetland Status and Implications for Indicating Ecosystem Functions

et al. 2021

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In this study, we analyzed microbial community composition and the functional capacities of degraded sites and restored/natural sites in two typical wetlands of Northeast China—the Phragmites marsh and the Carex marsh, respectively. The degradation of these wetlands, caused by grazing or land drainage for irrigation, alters microbial community components and functional structures, in addition to changing the aboveground vegetation and soil geochemical properties. Bacterial and fungal diversity at the degraded sites were significantly lower than those at restored/natural sites, indicating that soil microbial groups were sensitive to disturbances in wetland ecosystems. Further, a combined analysis using high-throughput sequencing and GeoChip arrays showed that the abundance of carbon fixation and degradation, and ~95% genes involved in nitrogen cycling were increased in abundance at grazed Phragmites sites, likely due to the stimulating impact of urine and dung deposition. In contrast, the abundance of genes involved in methane cycling was significantly increased in restored wetlands. Particularly, we found that microbial composition and activity gradually shifts according to the hierarchical marsh sites. Altogether, this study demonstrated that microbial communities as a whole could respond to wetland changes and revealed the functional potential of microbes in regulating biogeochemical cycles.

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Section: Study Sitesmentioning

confidence: 99%

Section: Study Sitesmentioning

confidence: 99%

Disentangling Responses of the Subsurface Microbiome to Wetland Status and Implications for Indicating Ecosystem Functions

et al. 2021

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“…Compared with neutral salts, NaHCO 3 and Na 2 CO 3 are more harmful to vegetation because of the combined effects of high electrical conductivity and high pH ( Tang and Turner, 1999 ; Shi and Sheng, 2005 ; Chen et al, 2017 ). Consequently, salinity and alkalinity act as the key attributes affecting plant establishment, growth, and distribution in saline-alkaline soils ( Silvestri et al, 2005 ; An et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, plant roots are the major organ in direct contact with the soil and thus primarily encounter any abiotic stresses ( Yang et al, 2011 ). The inherent variations in root architecture allow plants to adapt to saline-alkaline conditions, ultimately resulting in greater efficiency in nutrient and water absorption ( An et al, 2019 ). Plants attempt to circumvent highly saline media by altering the direction of their root growth ( Galvan-Ampudia et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Morphological and Physiological Traits Related to the Response and Adaption of Bolboschoenus planiculmis Seedlings Grown Under Salt-Alkaline Stress Conditions

Gao

Tong

et al. 2021

Front. Plant Sci.

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Soil saline-alkalization is expanding and becoming a serious threat to the initial establishment of plants in inland salt marshes on the Songnen Plain in Northeast China. Bolboschoenus planiculmis is a key wetland plant in this area, and its root tubers provide food for an endangered migratory Siberian crane (Grus leucogeranus). However, the survival of this plant in many wetlands is threatened by increased soil saline-alkalization. The early establishment of B. planiculmis populations under salt and alkaline stress conditions has not been well understood. The aim of this study was to investigate the response and adaption of the seedling emergence and growth of B. planiculmis to salt-alkaline mixed stress. In this study, B. planiculmis root tubers were planted into saline-sodic soils with five pH levels (7.31–7.49, 8.48–8.59, 9.10–9.28, 10.07–10.19, and 10.66–10.73) and five salinity levels (40, 80, 120, 160, and 200 mmol⋅L–1). The emergence and growth metrics, as well as the underlying morphological and physiological traits in response to salt-alkaline stress were explored for 2-week-old seedlings. The seedling emergence, growth, and leaf and root traits showed distinct responses to the pH and salt gradients. Under the lower saline-alkaline condition (pH ≤ 9.10–9.28 and salinity ≤ 80 mmol⋅L–1), the seedling growth was substantially facilitated or not significantly altered. Salinity affected the seedlings more significantly than alkalinity did. In particular, among the salt ions, the Na+ concentration had predominantly negative effects on all the morphological and physiological traits of the seedlings. Seedling emergence was more tolerant to salinity and, based on its observed close relationships with pH and the alkaline ion CO32–, was highly alkalinity-dependent. Moreover, the leaf area and photosynthetic rate, as well as the root surface area and tip number mainly accounted for the response of the seedling biomass to salt-alkaline stress. This is evidence of the adaption of B. planiculmis to saline-alkaline conditions largely due to the responses of its morphological and physiological traits. This study provides a mechanistic process-based understanding of the early seedling establishment of B. planiculmis populations in response to increased soil saline-alkalization in natural wetlands.

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“…As an important salt-tolerant plant in coastal wetlands, Suaeda salsa has great potential for the ecological restoration of wetlands [5]. Not only can it absorb large amounts of soil salt for storage in its thick leaves, but it can also accumulate and absorb heavy metals from the soil, improving and restoring damaged coastal wetland ecosystems [6][7][8]. Furthermore, it can adapt to different water and salt environments in the intertidal and upper tidal zones by adjusting its morphological characteristics and biomass allocation, thus maintaining population stability and improving salinized soil [9].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Suaeda salsa Spectral Response to Salt Conditions in Coastal Wetlands: A Case Study in Dafeng Elk National Nature Reserve, China

Xia¹,

Zhang²,

Tian³

et al. 2020

Remote Sensing

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This paper reports on monitored Suaeda salsa spectral response to salt conditions in coastal wetlands, using spectral measurements and remotely sensed algorithms. Suaeda salsa seedlings were collected from the Dafeng Elk National Nature Reserve (DENNR) in Jiangsu Province, China. We treated 21 Suaeda salsa seedlings planted in pots with 7 different salt concentrations (n = 3 for each concentration) to assess their response to varying salt conditions. Various plant growth indicators, including chlorophyll content, fresh weight, dry weight, and canopy hyperspectral reflectance, were measured. One-way analysis of variance (ANOVA) and post hoc multiple comparisons of least-significant difference (LSD) were used to explore the physiological indicators of sensitivity to salt treatment. Red edge parameters and spectral reflectance indices were used to analyze spectral response to salt conditions and to investigate the potential for remotely sensing physiological parameters which are sensitive to salt conditions. The results indicated that among these physiological indicators, the total chlorophyll content differed significantly with salt conditions, being highest at 50 mmol/L, whereas the differences observed for the morphological parameters were highest at 200 mmol/L. In addition, new vegetation indices were significantly more responsive to salt concentrations than were traditional red edge parameters. The two vegetation indices, D854/D792 and (D792 − D854)/(D792 + D854), were the most sensitive to the total chlorophyll content, and these also strongly correlated with salt concentrations. An analysis of the responses of plant growth indicators to salt treatment showed that soil having a salt concentration of 50~200 mmol/L is most suitable for the growth of Suaeda salsa. These results suggest the potential for using remote sensing to effectively interpret the causes of salt-induced spectral changes in Suaeda salsa. This methodology also provides a new reference for the inversion model of estimating the total chlorophyll content of Suaeda salsa under different salt concentrations in similar coastal wetlands, whether in China or elsewhere.

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Early establishment of Suaeda salsa population as affected by soil moisture and salinity: Implications for pioneer species introduction in saline-sodic wetlands in Songnen Plain, China

Cited by 32 publications

References 39 publications

Disentangling Responses of the Subsurface Microbiome to Wetland Status and Implications for Indicating Ecosystem Functions

Disentangling Responses of the Subsurface Microbiome to Wetland Status and Implications for Indicating Ecosystem Functions

Morphological and Physiological Traits Related to the Response and Adaption of Bolboschoenus planiculmis Seedlings Grown Under Salt-Alkaline Stress Conditions

Monitoring Suaeda salsa Spectral Response to Salt Conditions in Coastal Wetlands: A Case Study in Dafeng Elk National Nature Reserve, China

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